Here is a graph with the equation you gave graphed on it.
The pattern for first and second arrangement:
3 + 9 + 8 - 6 =14
10 + 2 + 7 - 3 = 16
Third arrangement:
11 + 8 + 17 - 4 = 32
We have the next formula to calculate the volume

where a is the length of the side in the base and h is the height
a=11cm
h=15cm
we substitue the values in the formula
26 and 27 26+27=53-27=26 27+26=53-26=27 then 27 -26=1 there one number apart there